Interaction of research questions
Multiphase flows occur in many natural and technological systems and often involve interacting physical processes across very different spatial and temporal scales. Small-scale phenomena at interfaces can strongly influence the behaviour of the overall system, making reliable modelling and prediction particularly challenging.
PN 1 investigated how detailed simulations, experimental data and data-driven methods could be combined with physics-based modelling to improve the simulation of multiphase flows in free-flow and porous-media systems. A particular focus was on transferring information across scales and flow regimes and on developing models and numerical methods that remained accurate and computationally feasible.
Research Focus
The research addressed four closely connected questions:
- Interface descriptions: How could complex processes at fluid-fluid and fluid-solid interfaces be represented accurately?
- Interface closures: How could detailed small-scale information be incorporated into models for larger-scale simulations?
- Turbulence closures: How could data improve the modelling of turbulent multiphase flows?
- Scale bridging and applications: How could models and data from different scales be combined to enable realistic simulations of complex systems?
Projects of PN 1
| Project Title | Projekt Lead |
| Data-driven closures for turbulent free and porous media flows | Andrea Beck, Rainer Helmig, Mathias Niepert |
| 3D direct numerical simulation of multi-component droplet interaction including phase change as a basis for sub-scale models for data-integrated multiphase simulations | Kathrin Schulte, Bernard Weigand, (Christian Rohde) |
| Influence of anisotropy and permeability on turbulent pumping by highly space and time-resolved measurements | Rico Poster, Grazia Lamanna, (Jürgen Pleiss) |
| Image-based morphological characterization of multiphase porous media flow | Holger Steeb, Nikolaos Karadimitriou, (Holger Class) |
| Numerical simulations and process analysis of CO2 enrichement in the vadose zone and the gas-water interface of karstic systems | Holger Class |
| Data-integrated two-scale modelling of compressible multiphase flow | Christian Rohde, (Andrea Beck), (Bernard Weigand) |
| Combining imaging, physics and analysis for rheological experiments | Bernadette Hahn-Rigaud, (Holger Steeb) |
| Integration of thermodynamic library data into openFOAM for the simulation of compressible multiphase flows with phase change | Natalie Germann, (Grazia Lamanna) |
| The impact of small-scale rock heterogeneity on multi-phase flow in porous reservoirs | Maartje Boon |
| Coupled flow, transport, and geochemical processes in fractures/fissures with a focus on geothermal and karstic systems | Rainer Helmig, Holger Class, Bernd Flemisch, Inga Berre, Eirik Keilegalven |
| Data-driven subgrid-closure models for simulating turbulent multi-phase flow | Andrea Beck, (Claus-Dieter Munz, Gabriele Santin) |
| A multiscale framework for multiphase flow based on the compressible Navier-Stokes-Korteweg system | Claus-Dieter Munz, (Christian Rohde) |
| 3D direct numerical simulation of multi-component droplet interaction including phase change as a basis for sub-scale models for data-integrated multiphase simulations | Kathrin Schulte, Bernhard Weigand |
| Impact of porous-media topology on turbulent fluid flow: Highly resolved space and time interactions | Rico Poser, Grazia Lamanna, (André Thess) |
| Image-based morphological characterization of multiphase porous media flow | Holger Steeb, (Nikolaos Karadimitriou, Holger Class) |
| Dispersion concept for interface closure in the context of coupling free-flow and porous media multiphase flow on the REV scale | Rainer Helmig, (Ingo Steinwart, Martin Schneider) |
| Upscaling of two-phase porous media flow based on fluid morphology | Carina Bringedal, Bernd Flemisch |
| Data-driven simulations for turbulence inside and over porous media | Xu Chu |
| Printing personalised medicines on demand: PrintMed Plus | Majid Hassanizadeh, Rainer Helmig, (Oliver Röhrle) |
Associated projects
| Experimental data-driven multi-phase flow simulations | Fabian Hampp |
| Approximation methods for statistical conservation laws of hyperbolically dominated flow | Christian Rohde (jointly with Prof. Martin Oberlack, TU Darmstadt) |
| Open-source simulation data for validation and machine learning | Andrea Beck, Claus-Dieter Munz, Johan Larsson (University of Maryland |
| Implementation of numerical schemes for river engineering problems in the development environment DUNE | Bernd Flemish |
| Modelling fluid interaction at the interface between porous GDL and gas distributor in a PEM fuel cell | Rainer Helmig |
| Printing personalised medicines on demand (PrintMed) | Majid Hassanizadeh |
Project Network Coordinators
Andrea Beck
Prof. Dr.-Ing.Numerical Methods in Fluid Mechanics
Holger Steeb
Prof. Dr.-Ing.Continuum Mechanics | Director of SC SimTech
Bernhard Weigand
Prof. Dr.-Ing. habil.Aerospace Thermodynamics